Improvement of call quality Fixing device of cordless telephone combined with key telephone line and trunk line

摘要

end. The technical field to which the design described in the claims belongs;To a fixing device of a wireless telephone.;I. The technical challenges that the design intends to solve;And a fixed device for providing the best call quality regardless of which line is used in a fixed device of a cordless telephone using both a CO line and a KEYPON line.;All. The point of solution of design;And a single-pole single-throw switch which is turned on when the fixing device of the wireless telephone is used when connected to the key telephone line and is turned on when the fixed device is connected to the coaxial line and the switch is connected to the automatic gain control terminal And a fixed device to be connected between predetermined resistances that suitably control the automatic gain control.;la. Important Uses of Design;There is an advantage that the best quality of call sound is provided when the fixed device of the wireless telephone is connected to both the key telephone line and the CO line.